public class Example12_2 { 

   public static void main(String args[]) { 

       Thread speakElephant;            

       Thread speakCar;                 

       ElephantTarget elephant;         

       CarTarget car;                   

       elephant = new ElephantTarget();

       car = new CarTarget();

       speakElephant = new Thread(elephant) ;   

       speakCar = new Thread(car);              

       speakElephant.start();                   

       speakCar.start();                        

       for(int i=1;i<=15;i++) {

          System.out.print("主人"+i+"  ");


       }  


   }


}
